Have you run MSINFO32 to get OS information and been greeted by this error: "Windows cannot open Help and Support because a system service is not running. To fix this problem, start the service named 'Help and Support'." You then go to the services listing and find that 'Help and Support' is not there.
Microsoft indicates this is a known issue on SBS 2003 after installing SP2 (I have seen and resolved this same behavior on Standard Edition as well). Here is the fix: [more]
open a command prompt and change directory to %windir%\PCHealth\HelpCtr\Binaries
-run 'start /w helpsvc /svchost netsvcs /regserver /install'
-once complete, refresh your Services listing and you should see 'Help and Support' ready to be started
-after starting that service, run MSinfo32 again